| Catalytic evaluation of promoted CeO2-ZrO2 by transition, alkali, and alkaline-earth metal oxides for diesel soot oxidation |
| |
| 作者姓名： | Ali Alinezhadchamazketi Abas Ali Khodadadi Yadollah Mortazavi Ahmad Nemati |
| |
| 作者单位： | Catalysis and Nanostructured Materials Laboratory, College of Engineering, School of Chemical Engineering, University of Tehran, P. O. Box 11155/4563, Tehran, Iran;Catalysis and Nanostructured Materials Laboratory, College of Engineering, School of Chemical Engineering, University of Tehran, P. O. Box 11155/4563, Tehran, Iran;Oil and Gas Processing Center of Excellence, College of Engineering, University of Tehran, P. O. Box 11155/4563Tehran, Iran;Catalysis and Nanostructured Materials Laboratory, College of Engineering, School of Chemical Engineering, University of Tehran, P. O. Box 11155/4563, Tehran, Iran;Oil and Gas Processing Center of Excellence, College of Engineering, University of Tehran, P. O. Box 11155/4563Tehran, Iran;Catalysis and Nanostructured Materials Laboratory, College of Engineering, School of Chemical Engineering, University of Tehran, P. O. Box 11155/4563, Tehran, Iran |
| |
| 摘 要： | Series of mixed metal oxides were synthesized by gel-combustion method and their catalytic activities for soot oxidation were investigated. The catalysts were M-Ce-Zr （M = Mn, Cu, Fe, K, Ba, Sr）, and χK-20Mn-Ce-Zr （χ= 0, 5, 10, 20）, they were characterized by XRD, SEM, TPR and BET surface area techniques. The results of soot temperature programmed oxidation （TPO） in an O2 oxidizing atmosphere indicate that K-Ce-Zr has the highest catalytic activity for soot oxidation under loose contact condition, due to enhancement of the soot and catalyst contacts. On the other hand, under a tight contact condition, Mn-Ce-Zr and Cu-Ce-Zr nano-composites have high activities for soot oxidation and lower the soot TPO peak temperatures by about 280 and 270℃, respectively, as compared to non-catalytic soot oxidation. Furthermore, the addition of up to 10 wt.% potassium oxides into Mn-Ce-Zr increases its catalytic activity and further reduces the soot TPO peak temperature by about 40℃ under loose contact condition.
|
| 关 键 词： | 碱土金属氧化物 二氧化锆 催化活性 CeO2 碳烟氧化 混合金属氧化物 BET比表面积 评价 |
| 收稿时间： | 19 February 2013 |
| 修稿时间： | 22 July 2013 |
Catalytic evaluation of promoted CeO2-ZrO2 by transition, alkali, and alkaline-earth metal oxides for diesel soot oxidation |
| |
| Ali Alinezhadchamazketi,Abas Ali Khodadadi,Yadollah Mortazavi,Ahmad Nemati.Catalytic evaluation of promoted CeO2-ZrO2 by transition, alkali, and alkaline-earth metal oxides for diesel soot oxidation[J].Journal of Environmental Sciences,2013,25(12):2498-2506. |
| |
| Authors: | Ali Alinezhadchamazketi Abas Ali Khodadadi Yadollah Mortazavi and Ahmad Nemati |
| |
| Institution: | Catalysis and Nanostructured Materials Laboratory, College of Engineering, School of Chemical Engineering, University of Tehran, P. O. Box 11155/4563, Tehran, Iran;Catalysis and Nanostructured Materials Laboratory, College of Engineering, School of Chemical Engineering, University of Tehran, P. O. Box 11155/4563, Tehran, Iran;Oil and Gas Processing Center of Excellence, College of Engineering, University of Tehran, P. O. Box 11155/4563Tehran, Iran;Catalysis and Nanostructured Materials Laboratory, College of Engineering, School of Chemical Engineering, University of Tehran, P. O. Box 11155/4563, Tehran, Iran;Oil and Gas Processing Center of Excellence, College of Engineering, University of Tehran, P. O. Box 11155/4563Tehran, Iran;Catalysis and Nanostructured Materials Laboratory, College of Engineering, School of Chemical Engineering, University of Tehran, P. O. Box 11155/4563, Tehran, Iran |
| |
| Abstract: | Series of mixed metal oxides were synthesized by gel-combustion method and their catalytic activities for soot oxidation were investigated. The catalysts were M-Ce-Zr (M = Mn, Cu, Fe, K, Ba, Sr), and xK-20Mn-Ce-Zr (x = 0, 5, 10, 20), they were characterized by XRD, SEM, TPR and BET surface area techniques. The results of soot temperature programmed oxidation (TPO) in an O2 oxidizing atmosphere indicate that K-Ce-Zr has the highest catalytic activity for soot oxidation under loose contact condition, due to enhancement of the soot and catalyst contacts. On the other hand, under a tight contact condition, Mn-Ce-Zr and Cu-Ce-Zr nano-composites have high activities for soot oxidation and lower the soot TPO peak temperatures by about 280 and 270°C, respectively, as compared to non-catalytic soot oxidation. Furthermore, the addition of up to 10 wt.% potassium oxides into Mn-Ce-Zr increases its catalytic activity and further reduces the soot TPO peak temperature by about 40°C under loose contact condition. |
| |
| Keywords: | soot oxidation diesel ceria-zirconia metal oxide |
| 本文献已被 维普 ScienceDirect 等数据库收录！ |
| 点击此处可从《环境科学学报(英文版)》浏览原始摘要信息 |
| 点击此处可从《环境科学学报(英文版)》下载免费的PDF全文 |
|
